Skincare is one of the few beauty categories where I treat ingredient lists like a personal scoreboard. As a beauty shopping reporter, I spend a lot of time comparing formulations, tracking how actives behave across different skin types and noticing which products actually deliver on their claims versus those that just sound impressive on paper. That habit becomes especially useful when looking at skincare through the lens of age. Skin in the early 20s tends to respond best to straightforward cleansing, oil control and barrier-friendly hydration that doesn’t overwhelm. By the 30s, the focus moves toward sustained hydration and ingredients that support firmness and texture, while peptides and vitamin C begin to show their value. In the 40s and beyond, people begin to want more moisture support, barrier reinforcement and formulas that help skin maintain resilience as natural cell turnover changes. How does the skin change as we age?…